Michael Johnson and the former Joyce Crawford were married June 22, 1969, at Trinity Lutheran Church in Carthage. They are the parents of one son, Todd Johnson of Princeton, and one daughter, Jill (John) Kocsis of Oswego. They also have three grandsons, Evan, Noah and Drew of Oswego.

Michael is employed by Princeton Elementary School District. He retired from teaching eighth-grade science at Logan Junior High School in 2002. Joyce is employed by the Princeton Elementary School District. The couple enjoys fishing, camping and spending time with their grandsons.